Popular radio star suffered from Parkinson's disease, dementia

Casey Kasem, who entertained radio listeners for almost four decades as the host of countdown shows such as "American Top 40" and "Casey's Top 40," died early Sunday, according to a Facebook post from his daughter Kerri Kasem.

The news was confirmed by Casey's Kasem's agent, Don Pitts, who added a memorial service will be held Friday. Casey Kasem was 82.

Kasem had Lewy body disease, the most common type of progressive dementia after Alzheimer's, and had been bed-ridden for some time.

He had been hospitalized in Washington state for two weeks.

"Even though we know he is in a better place and no longer suffering, we are heartbroken," Kerri Kasem wrote. "Thank you for all your love, support and prayers. The world will miss Casey Kasem, an incredible talent and humanitarian; we will miss our Dad."

Kerri Kasem said friends and family were by her father's side when he died.

U.S. radio listeners knew Kasem for decades as the host of music countdown shows "American Top 40" and "Casey's Top 40." He retired in 2009.

Kasem was also the voice of Shaggy in the cartoon "Scooby Doo" and an announcer for NBC.

Kasem was recently at the center of a family feud between Jean Kasem, his wife of 34 years, and his three children from his first marriage.

Kerri Kasem; her sister, Julie; and their brother, Mike Kasem, contended since last year that Jean Kasem has prevented the three siblings from visiting their father. Kerri Kasem won a California court order in late May to become the temporary conservator for her ailing father, but he went missing for a few days before being found in Washington state with his wife, Kerri's stepmother.CNN